Net::SIP::Dropper::ByField - drops SIP messages based on fields in SIP header

       new ( ARGS )
           ARGS is a hash with the following keys:

           methods Optional argument to restrict dropping to specific methods.

                   Is  array  reference  of  method  names,  if one of the names is empty also responses will be
                   considered. If not given all packets will be checked.

           field-name
                   Any argument other then "methods" will be considered a field name.  The value is  a  callback
                   given to "invoke_callback", like for instance a Regexp.

       With "Net::SIP::Dropper::ByField" one can drop packets based on the contents of the fields in the SIP
       header. This can be used to drop specific user agents.

       run ( PACKET, LEG, FROM )
           This method is called as a callback from the Net::SIP::Dropper object.  It returns true if the packet
           should  be  dropped,  e.g.  if  at  least  one of the in the constructor specified fields matches the
           specified value.

perl v5.40.0                                       2024-09-08                    Net::SIP::Dropper::ByField(3pm)

       Net::SIP::Dropper::ByField - drops SIP messages based on fields in SIP header

           my $drop_by_field = Net::SIP::Dropper::ByField->new(
               methods => [ 'REGISTER', '...', '' ],
               'From' => qr/sip(?:vicious|sscuser)/,
               'User-Agent' => qr/^friendly-scanner$/,
           );

           my $dropper = Net::SIP::Dropper->new( cb => $drop_by_field );
           my $chain = Net::SIP::ReceiveChain->new([ $dropper, ... ]);